Adenoid cystic carcinoma (cylindroma) is a well-recognized malignant neoplasm that is frequently encountered in the major salivary glands, lacrimal glands, and minor salivary glands, It seldom occurs in the larynx, accounting for less than 0.25% of all laryngeal carcinomas. It is characterized by symptoms of long duration, slow progressive growth with tendency of local recurrence, and eventual distant metastasis despite of aggressive treatment. Ten-year survival rate is suggested to replace the traditional five-year survival rate in evalua-tion of treatment result because of the slow growth rate and long latent time before recurrence of this tumor. Adenoid cystic carcinoma of the larynx is believed to originate from mucous glands of the larynx. The typical pathologic picture is cribriform pattern . We report a case of 56 year-old female, who had adenoid cystic carcinoma of the larynx. She received total laryngec-tomy and post-operative radiotherapy in November 1992. Neither local recurrence nor distant metastasis has been found after treatment.